# SOLUTION: How many gallons of pure water is to be added to 100 gallons of a 30% saline solution to make it a 10% saline solution?

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 Click here to see ALL problems on Mixture Word Problems Question 491228: How many gallons of pure water is to be added to 100 gallons of a 30% saline solution to make it a 10% saline solution?Answer by stanbon(57361)   (Show Source): You can put this solution on YOUR website!How many gallons of pure water is to be added to 100 gallons of a 30% saline solution to make it a 10% saline solution? ------------------------------- Equation: water + water = water 0.70*100 + x = 0.90(100+x) ---- Multiply thru by 100 to get: 70*100 + 100x = 90*100 + 90x 10x = 20*100 x = 200 gallons (amt. of pure water to be added) =================================================== Cheers, Stan H. ==================